Die for making mattocks and similar tools.



PATENTED JULY 24, 1906.

G. P. KONOLD. MATTOGK S AND SIMILAR TOOLS. DEQ.23.1904.

APPLICATION FILED THE NORRIS PETERS cc., WASHINGTON, n. c,

DIES FOR MAKING UNITE STATES PATENT OFFICE.

GEORGE F. KONOLD, OF ASPIN WALL, PENNSYLVANIA, ASSIGNOR TO IRON CITYTOOL WORKS, LIMITED, OF PITTSBURG, PENNSYLVANIA, A LIMITEDGOPARTN-ERSHIP UNDER THE LAW S OF 'PENNSY LVANIA.

DIE FOR MAKING NIATTOGKS AND SIMILAR TOOLS- Specification of LettersPatent.

PatentedjJ'uly 24, 1906.

Application filed December 23, 1904. Serial No. 238,119.

To all whom it may concern: vBe itknown'that I, GEORGE F. KONOLD, a

:resident of Aspinwall, in the county of Allegheny and StateofPennsylvania, have invented a new and useful Improvement in Dies'forMaking Mattocks and Similar Tools;

and I do hereby declare the followingto be a .full, clear, and exactdescription thereof.

My invention relates to pressing-dies for :the manufacture of mattocksand similar itools,its object being to provide dies of suitableconstruction for shaping and finishing the mattocksto standard anduniform shape.

. To these ends my invention comprises, generally stated, a pair ofdies, one of which "has a longitudinal central rib with trans-.versely-inclined face on each side thereof by .which'the mattock-blademay be spread laterally by separate pressing operations on each side ofits central rib, this die being also preferably provided with alongitudinallyinclined face on its rear end in line with thetransversely-inclined face adapted in connection with such spreadingoperations to develop a tapered face near the cutting edge of themattock-blade.

It also consists in certain other improvements hereinafter more fullyset forth and claimed.

. side ofthe central rib. Fig. 3 is a side view of the dies of Fig. 2,showing the blank in :position to be operated. Fig. 4 is a cross- Fig. 5shows perspective views of the edge-pressing dies for-finishing the eyeand the edge of the mattook. Fig. 6 shows a blank suitable for theoperation of'thedies of Figs. 2 to 4. Fig. 7 shows the blank after apressing operation of said dies; and Fig. 8 shows the finished mat-.tock-blade after the operation of said dies .and thoseof Fig. i; andready for trimming and grinding, the said blanks being shown in side andface views.

The press illustrated in Fig. '1 shows a press suitable for the diesinvolving the invention, such press providing .for regular fixed pressinstrokes as distinguishedfrom the ordinary ammer-strokes by whichInattock blades'have heretofore been developed. In said press thehousings are shown at 1, these housings carrying the anvil block 2, onwhich are supported the dies and'havingthe horizontal eccentric-shaft 3mounted therein and carrying suitable eccentrics 4, operating withsuitable eccentric-straps and pitman extensions 5 to, ive the regularreciprocating pressing stro e to the die-block 6, moving in guides 7 andcarrying the-top or moving die. The press may be driven by any suitablepower. It is illustrated as driven by a motor 8 through suitable gearingv9 9.

The dies of Figs. 2, 3, and 4 are mounted in the anvil-block 2 andthereciprocatingdieblock 6, and I will first describe that constructionand the functions performed by them. They are employed for the purposeof imparting the final shape to the mattockblade after it has beenproperly developed by other pressing-dies, the mattock blank havin thefully-developed eye 10 and on one si e thereof the blank 11, from whichthe cutter is to be developed, while on the other side is themattock-blade 12, which has been partly developed by previous pressingoperations, this blade having the central rib 13 and the rounded cornerportions 14, while the eye portion at the junction of the mattock-bladeand eye has been fully developed, as shown at 15.

The dies shown in Figs. 2 to 4 are em- 7 ployed for the purpose ofimparting the final shape to the mattock-blade as sopreviously is anordinary square die with aiflat ottomface, while the lower die 17 is ofpeculiar sha c. It has the longitudinal central rib l8 and on eachsidethereof the transverse inclined face 19,.and extending down-from eachsuch inclined facethefront corner of the die is beveled off to formthediagonal die-face 2-0 to permit the blank to be so placed upon thedie that the rounded corner 14 thereof may be placed upon thetransversely-inclined or tapered face 19, the eye portion of the mattockresting against the diagonal face 20 of the die. Such beveled corner ordiagonal face 20 and the transversely-inclined face 19 are connected bythe diagonal curved inclined ortion 21, corresponding in shape to themeta at the junction of the eye and blade of the mattock. Beyond eachtransverse inclined face 20 is the longitudinal inclined face 22,connected.

to the transversely-inclined face 20 along the diagonal line 23, suchdiagonal lines extending backwardly to, the central rib 18 near the rearof the die. The transversely-inclined faces 20 are also referablyinclined or tapered longitudinally according to the natural taper of themattock-blade to be formed.

The dies 24 and 25 of Fig. 5 are of the same shape, each having near theforward end the V-shaped projection 26, with the curved face 27 in frontof the same corresponding in shape to the desired finished shape of theforward portion of the eye 10, while back of said V- shaped projection26 is the curved face 28, corresponding to the desired curve of therounded shoulder portion 30 of the finished mattock-blade, and beyondthesame the inclined edging face 28, which flares slightly, according tothe desired spread or increasing width of the finished mattock-blade.

In the use of the dies above described a blank such as shown in Fig. 6and above described having the fully-developed eye 10, the blade 12,with its central rib 13 and rounded corners 14, is placed upon thetransve'rsely-inclined die-face 19 of the lower die 17 on one side ofthe central rib 18, its eye portion fitting against the diagonal face 20at the corner of the die and over the diagonal curved inclined portion21 thereof. Under pressure of the top die this side of the mattook-bladeis then spread out, when the mattock is then placed in like position onthe transversely-inclined die-face on the other side of the central ribto spread out in like manner the other side of the mattock-blade.

I At the same time through the longitudinal inclined face 22 in linewith each transverse inclined face 20 the inclined tapering face 31 ofthe blank is developed, partly by one such pressing stroke on one sideof the central rib and partly by the other pressing stroke on the otherside of the central rib.

In the previous pressing of the blank shown in Fig. 6 and before it issubjected to the action of the dies of Figs. 2 to 4, or in the spreadishthe rounded corner ortions 30 and bring the eye central of the blade, atthe same time forcing the metal of the blade somewhat forward toward thepoint thereof and holding the blade to the desired finished shape,insuring a finished straight side edge 32. The blade may thus besubjected alternately to the action of the dies of Figs. 2 to 4 on eachside of the central rib 18 and then to the action of the dies of Fig. 5,being thus spread and drawn out longitudinally, while the blank is heldto proper shape and the eye maintained central of the blank, and thejunction 33 of the eye and blade is brought to exact finished shape. Inthis way by as many pressin strokes as necessary the blank is broug t tofinished shape, such as shown in Fig. 8, having in addition tothefinished eye 10 rounded corner portions 30, a central rib 13, andtapering face 31 close to its cutting edge. The surplus metal may thenbe cut from the blank to form its cutting edge and the blank be suitablyground and finished.

By means of the dies herein described I am enabled from a blank whichhas been previously brought substantially to the shape shown in Fig. 6to produce at the same heat the finished mattock, having widemattockblades of uniform sha e and taper with properly-formed edges andhaving the eye central of such blade by a few pressing strokes.

What I claim is- 1. In pressing-dies for the manufacture of mattocks andsimilar tools, the combination of a pair of dies, one of which has aflat working face, while the other has a central rib and atransversely-inclined face on each side thereof for drawing out themattock-blade laterally.

2. In pressing-dies for the manufacture of mattocks and similar tools,the combination I of a pair of dies, one of which has a central rib anda transversely-inclined face on each side thereof for drawing out themattockblade laterally, and a diagonal face at each corner to providefor plac ng the blade upon such transversely-inclined face.

3. In pressing-dies for the manufacture of .mattocks and's1milar tools.the combination of a pair of dies, one of which has a flat working face,while the other has a central rib and a transversely-inclined face oneach side thereof for drawing out the mattock-blade laterally, and alongitudinally-inclined face near the rear portion of the die in linewith each transversely-inclined face for formin a tapered face near thecutting edge of t e blade. 1

4. In pressing-dies for the manufacture of mattocks and similar tools,the combination of a pair of dies, one of which .has a central rib and atransversely-inclined face on each side theereoffor drawing out themattockblade laterally, and a diagonal face at each I In testimonywhereof T, the said GEORGEF. corner to provide for placing the bladeupon KoNoLD, have hereunto set my hand. such transversely-inclined face,and a longitudinally-inclined face near the rear portion GEORGE KONOLDof the die in line With each transversely-in- Witnesses: clined face forforming a tapered face near ROBERT C. TOTTEN,

the cutting edge of the blade. G. C. RAYMOND.

